Trip-hammer.



J. L. KELLEY r TRIP HAMMER.

APPLICATION FILED mums, 1912.

1,035,968. r v Patented Aug. 20,1912.

2 SHEETS-SHEET l.

J 2'5. WITNESSES? 4 IN/7NTOR.

A TTORNE Y.

J. L. KELLEY.

TRIP HAMMER.

APPLICATION FILED FEB.23, 1912.

Patented Aug. 20, 1912.

' 2' SHEETSSHEET 2.

IN VEN TR.

WITNESSES A TTORNE Y.

' notches 14 and 15.

JOHN L. KELLEY, or'tawanncn, i/mssaonus nrrs.

fair-Harman.

Specification of Letters Patent.

To all/whom it may concern:

Be it known that I, JorIN L. KELLEY, a citizen of the United States, residing at Lawrence, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Trip-Hammers, of which the following is a specification.-

This invention relates to trip hammers.

It is a. triphammer which delivers a blow upon a suitable anvil after the head has been lifted and released.

The invention particularly relates to the lifting and release mechanism.

The head is carried by a vertical shaft or handle having one or more notches which engage teeth carried by suitable .means which are given a vertical reciprocating action. Such teeth are so operated by suitable retracting and advancing mechanism that each engages one of said notches while rising and thereby lifts the shaft and hammer head until the toothis retracted at a predetermined point. The distance of the drop and therefore the force of the blow can be quickly changed and made greater or lesswith the utmost accuracy. The machine can be adjusted to deliver either one or .two blows during every revolution of the power shaft and theseblows can be light or heavy or light and heavy at will.

In the drawings, Figure 1 is a front View and Fig. 2 is a side view of the machine. Figs. 3 and 4 show modified forms of details of construction. Fig. 5 is an enlarged front view, Fig. 6 is an enlarged side view and Fig. 7 is an enlarged back view of the middle portion of the machine. Fig. 8 is a sectional view on line X-Y of Fig. 5, some parts being shown not in section.

A is the frame of the machine and supports in a suitable position an anvil B.

10 represents aportion'of the frame which is formed with guides to slidably receive the hammer head C. These guides are vertical and hammer headC should be longer than the maximum length of the stroke.

' 11 is the hammer shaft, or handle which carries head C and extends upward through suitable guides or bearings 12 in the top of frame A. Fi'ame A may-besurmounted by a cap 13 if desired. Shaft 11 has on each side at the appropriate position a notch or Power is applied to the machine through the medium of a pulley 20 or a pulley 21 by means of suitable belts,

or power may be applied by hand through .4

Application filed February 23, 1912. Serial No. 679,330.

the medium of crank handle 22. Pulleys 20 and 21 are carried by a power shaft 23 which has oppositely disposed cranks 24 and 25. These carry respectively pitmen 26 and 27. These pitmen connect respectively with boxes 2S.and 29 which are slidable ver- Patented Aug. 20,1912. Y

tically in suitable guides, one of which is each also carries rigidly at its outer end an arm 36 or 37 at the end of each of which is a whirl or retracting roller 38 or 39. On each side of frame A in operative relation with the rollers 38 or 39 are vertically slidable guideways 40 and 41. Each of these guideways is su'fliciently flat at its lower portion to be out of engagement with either of the tooth retracting rollers 38 or 39 but at its upper portion 42 or 43 extends outward at preferably rather. a steep angle to such a distance that when the tooth retractin roller mounts thereon, it will withdraw t 1e tooth 30 or 31 from engagement with the notch on the hammer shaft. Each guideway 40 and a1 is adjustable vertically by means of a lever 44 or 45 which is pivoted to the side of frame A and pivotally connected with one of such guideways. By

means of these levers or by any other convenient means, guideways 40 and 41 may be raised or lowered whereby the tooth retracting rollers will be in to mount them at any desired point in t e vertical movement of the sliding boxes which carry the teeth.

It is manifest that, asthe shaft 23 revolves, if one tooth 31 is kept out ofaction, the hammer head will be lifted at each revolutionby the other tooth 30 which will engage a notch in the hammer shaft 11. Now by raising or lowering 'the guideway 40, tooth 30 will be rotated allowing the hammer to drop at any predetermined point at which the guideway is adjusted. A very slight drop and consequently a light blow may be used'or the hammer head may be lifted to almost the full limit of the crank throw.

It is also manifest that if the guide-.

way 40 is brought down to such a point tha't it will cause the withdrawal of tooth 30 before the other crank has brought tooth 31 to the lowest point, the hammer head will,

'wearin'go f the teeth by contact on the down stroke with the shaft 11 and of locking the tooth on one side out of engagement thus permitting the other side to work alone, I

prefer to use a two armed spring such as shown 1n Fig. 6, one arm 50 being attached to a box as 28 and the other 51 extending outside of and in contact with a tooth as 31 I or 30. Each tooth has a groove or depression 35 at such a point that when the tooth is withdrawn, arm 51- will drop thereinto and thereby hold-the tooth out of contact with shaft 11 until arm 51 is withdrawn. With this two armed spring, I prefer to use pins 53 as shown in Fig. 6 attached to each pitman 26 and 27 which extends out into the path of spring arm 51. Spring arm 51 is so bent that it can be sprung. around the end of 53 inside thereof when it will fall into groove 35 and remain there thus keeping the tooth entirely out of action. After it is sprung around outside of pin 53 as shown in Fig. 6 arm 51 will rest in groove 35 until the crank arm reaches the lowest point and begins to advance on the up stroke when as shown by the dotted lines in Fig. 6

its action on pin 53 will forcearm 51 out of groove 35 permitting the tooth to be forced in by its spring at a low point of the stroke where it immediately engages a notch on shaft 11.

My device may be used as a single action.

hammer by locking out of operation the tooth on one side or the other and it is evident that if one side breaks .down it does not affect the other. It is deemed unnecessary to illustrate a single, action hammer of the same construction.

In Fig. 3 is shown a slightly different construction wherein the hammer head is free and is guided by guides12 and through which the handle or shaft is slidable.

- As shown in Fig. 4, a guideway 71 having double tracks 72 and 73 which engage two whirls 74 and 7 5 attached to each tooth as 76 may be used and such guideways may be adjusted by'a screw action 77 as shown, instead of by a lever. both guideways as by raising the handles of the guideway levers, the hammer may be thrownout of action while the 'belt, pulley and power shaft are still revolving. I pre By throwing down and vertically slidable in bearings in the frame, combined with a box slidable in the frame, means for giving said box a vertically reciprocating motion, and an adjustable guideway vertically slidable on the frame, together with a tooth in operative re lation with the notches in the hammer shaft, and a roller carried by said tooth in opera tive relation with the guideway, as described.

'2; In a trip hammer, a frame having guideways therein, a hammer head vertically slidable in bearings in the frame and carried by a hammer shaft having notches, combined with a power shaft having oppositely disposed cranks, pitmen operative by the cranks, boxesslidable in the frame and each attached to a pitman, together with adjustable guideways slidable on the frame, and a spring actuated tooth in each box in operative relation with the notches in the hammer shaft, and a roller carried by each tooth in operative relation with a guideway, as described.

3. In a trip hammer, a frame having guideways therein, a hammer head vertically slidable in bearings in the frameand carried by a hammer shaft having notches on, opposite sides, combined with a power shaft having two oppositelydisposed cranks, pitmen operated by the cranks, boxes slidable in the frame and each attached to a itman, together with two adjustable guideways each slidable on opposite sides of the frame and each being flat at its lower portion and extended outward at its upper portion, levers pivoted to the guideways, and a tooth slidable in each box in operative relation with the notches on the hammer shaft, a spring in each box in operative relation with each tooth, and a roller carried by each tooth in operative relation with a guideway, as described. I

4. In a trip. hammer, a frame. having guideways therein, a hammer head vertically slidable in bearings in the frame and carried by a hammer shaft having notches,

sitely disposed cranks, pitmen'operative by the cranks, boxes slidable in the frame and each attached to a pitman, together with adjustable guideways slidable-on the frame,

and as'pring actuated tooth in each box in operative relation with the notches in the hammer shaft and having a groove, a two armed spring attached to each box by one arm in such position that the other arm will cm carried by a hammer shaft having gage carried by each tooth in operative relation with a guideway, as described.

In a trip hammer, a frame having guideways therein, a hammer head verticaliy slidable in hearings in the frame and notches, combined with a power shaft having oppositely disposed cranks, pitmen operative by the cranks, boxes slidable in the frame and each attached to a pitman, together with adjustable guideways siidable on the frame, and a spring actuated tooth in each box in operative relation with the notches. in the the grooves in the tooth, and a rollers; hammer shaft and having a groove, a two armed spring attached to each box by one arm in such position that the other arm will engage the groove in the tooth, and a pin s0 attached to each pitman as to engage the free end of a two armed spring, and a roller carried by each tooth in operative relation with a guideway, as described.

In testimony whereof I hereto afiix my signature in presence of two Witnesses.-

JOHN L. KELLEY. Witnesses:

HARRY R. LAWRENCE, GARDNER WV. PEARSON. 

